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Question

Solve the following equation.
x24xy+4y2=0,x22y22=0.

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Solution

Eliminating the constant term by multiplying 2nd equation by 2 and subtracting from 1st
x24xy+4y2=0 or (x2y)2=0
x=2y
Putting in 2nd, we get
4y22y2=2
y2=1
y=1,1
x=2,2.
You may also follow homogenous method.

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